Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Alexander Co., Illinois, USA

mindat Locality ID: 64409
mindat URL: http://www.mindat.org/loc-64409.html

Tectonic Settings:

Total number of sublocalities beneath "Alexander Co., Illinois, USA": 19
Total number of bottom-level sublocalities: 19

Number of Child Localities: 19
Child Localities:
Birk No. 2 Pit
Birk No. 2a Pit
Birk No. 2b Mine
Birk No. 3 Mine
Burk Mine Tammsco Inc.
Fayville
Illinois Minerals Company No. 16 Mine
Illinois Minerals Company No. 24 Mine
Limestone Prospect (MRDS - 10266100)
Mississippi River Shale Exposure Prospect
Moad Mines
Rhymer Mine
Shawnee Low Interest Refractory Clay Deposit
Shawnee Special Use Silica Deposit 2
Shawnee Special Use Silica Deposit 3
Shawnee Special Use Silica Deposit 4
Spring Clay Pit
Thebes Sandstone Deposit
Whitaker Mines

Latitude: 37°21'39"N
Longitude: 89°21'40"W
Decimal Degree (lat, lon): 37.360833333333,-89.361111111111

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Amorphous	Corundum	Diamond	Marcasite	None	Not in a structural group	Quartz	Rutile	Staurolite	Zircon

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al C Fe H O P S Si Ti Y Zr

Elements from minerals reported directly at this locality: C H O Si

Structural Groups for minerals in this locality:
Amorphous Corundum Diamond Marcasite None Not in a structural group Quartz Rutile Staurolite Zircon

11 IMA Minerals at location:

Diamond ()*	Ilmenite ()*	Kyanite ()*	Marcasite ()*	Opal ()*
Quartz ()*	Rutile ()*	Sillimanite ()*	Staurolite ()*	Xenotime-(Y) ()*
Zircon ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Diamond ()*	Diamond	C	0		697
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	1	212282	5433
Kyanite ()*	Not in a structural group	Al₂OSiO₄	1	212282	1507
Marcasite ()*	Marcasite	FeS₂	1	212282	5674
Opal ()*	Amorphous	SiO₂·nH₂O	0		2994
Quartz ()*	Quartz	SiO₂	0		61156
Rutile ()*	Rutile	TiO₂	1	212282	5614
Sillimanite ()*	Not in a structural group	Al₂SiO₅	1	212282	1516
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	1	212282	978
Xenotime-(Y) ()*	Zircon	Y(PO₄)	1	212282	939
Zircon ()*	Zircon	Zr(SiO₄)	1	212282	5251

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...